Ammola vapor is compressed in a closed system from 15 psia, 3 cu ft, to 150 psia, 0.4 cu ft. according to the relation pVn = constant. Assumin the vapor to be an ideal gas with the gas constant as 90.72 lbm-ft/lbf -°R and cv = 0.384 BTU/lbm - °R compute the heat transferred and the work.
As per the relation
take log both sides
so here value of n which follows above equation is 1.14
Now, we know that work done for polytropic process is
from ideal gas equation we can find value of temperature as
Heat transfer as per first law of thermodynamics
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